Commit ded2ee36 authored by Stafford Horne's avatar Stafford Horne
Browse files

openrisc: Add pci bus support 



This patch adds required definitions to allow for PCI buses on OpenRISC.
This is being tested on the OpenRISC QEMU virt platform which is in
development.

OpenRISC does not have IO ports so we keep the definition of
IO_SPACE_LIMIT and PIO_RESERVED to be 0.

Note, since commit 66bcd060 ("parport_pc: Also enable driver for PCI
systems") all platforms that support PCI also need to support parallel
port.  We add a generic header to support compiling parallel port
drivers, though they generally will not work as they require IO ports.

Signed-off-by: default avatarStafford Horne <shorne@gmail.com>
parent 0757060a

arch/openrisc/Kconfig

+4 −1
Original line number Diff line number Diff line
@@ -20,8 +20,9 @@ config OPENRISC 
	select GENERIC_IRQ_CHIP

	select GENERIC_IRQ_PROBE

	select GENERIC_IRQ_SHOW

	select GENERIC_IOMAP

	select GENERIC_PCI_IOMAP

	select GENERIC_CPU_DEVICES

	select HAVE_PCI

	select HAVE_UID16

	select GENERIC_ATOMIC64

	select GENERIC_CLOCKEVENTS_BROADCAST
@@ -32,6 +33,8 @@ config OPENRISC 
	select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1

	select ARCH_USE_QUEUED_RWLOCKS

	select OMPIC if SMP

	select PCI_DOMAINS_GENERIC if PCI

	select PCI_MSI if PCI

	select ARCH_WANT_FRAME_POINTERS

	select GENERIC_IRQ_MULTI_HANDLER

	select MMU_GATHER_NO_RANGE if MMU

arch/openrisc/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

generic-y += extable.h

generic-y += kvm_para.h

generic-y += parport.h

generic-y += spinlock_types.h

generic-y += spinlock.h

generic-y += qrwlock_types.h

arch/openrisc/include/asm/io.h

+1 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
#include <linux/types.h>



/*

 * PCI: can we really do 0 here if we have no port IO?

 * PCI: We do not use IO ports in OpenRISC

 */

#define IO_SPACE_LIMIT		0